package com.example.util;

import org.apache.commons.lang3.StringUtils;

public class RedisKeyUtil {

    private static final String SPLIT = ":";
    private static final String PREFIX_ENTITY_LIKE = "like:entity";
    private static final String PREFIX_USER_LIKE = "like:user";
    private static final String PREFIX_FOLLOWEE = "followee";
    private static final String PREFIX_FOLLOWER = "follower";
    private static final String PREFIX_KAPTCHA = "kaptcha";//使用redis存储验证码
    private static final String PREFIX_TICKET = "ticket";//使用redis存储登录凭证
    private static final String PREFIX_USER = "user";

    // 某个实体的赞
    // like:entity:entityType:entityId -> set(userId)
    public static String getEntityLikeKey(int entityType, int entityId) {
        return PREFIX_ENTITY_LIKE + SPLIT + entityType + SPLIT + entityId;
    }

    //某个用户获得的赞
    // like:user:userId -> int
    public static String getUserLikeKey(int userId){
        return PREFIX_USER_LIKE + SPLIT + userId;
    }

    //某个用户关注的目标实体
    //followee:userId:entityType -> zset(entityId, now) 按照时间进行排序
    public static String getFolloweeKey(int userId, int entityType){
        return PREFIX_FOLLOWEE + SPLIT + userId + SPLIT + entityType;
    }

    //某个实体拥有的粉丝
    //follower:entityType:entityId -> zset(userId,now)
    public static String getFollowerKey(int entityType, int entityId){
        return PREFIX_FOLLOWER + SPLIT + entityType + SPLIT + entityId;
    }

    // 登录验证码
    public static String getKaptchaKey(String owner){
        return PREFIX_KAPTCHA + SPLIT + owner;
    }

    //登录的凭证
    public static String getTicketKey(String ticket){
        return PREFIX_TICKET + SPLIT + ticket;
    }

    //用户
    public static String getUserKey(int userId){
        return PREFIX_USER + SPLIT + userId;
    }
}
